why not load view when i call a function? codeigniter - php

Question

I have a problem in codeigniter.
I call a funtion in controller Articles from the view.
<li><a href="index.php/articles/Category/1" ><?php echo $item['CATEGORY'] ?></a></li>
The function
function getCategories() {
$this->db->select('ID_CAT,CATEGORY');
$this->db->from('CATEGORY');
$query = $this->db->get();
if ($query->num_rows() > 0) {
return $query->result_array();
} else {
return FALSE;
}
}
function Category($id_cat) {
if (!$id_cat) {
$id_cat = 0;
}
$this->load->model('graf/home_model');
$data = array();
$data['categories'] = $this->home_model->getCategories();
$filtro_cat = $id_cat;
$data['article'] = $this->home_model->getArticles($filtro_cat);
$this->load->view('graf/articles', $data, TRUE);
}
home_model
function getArticles($filtro_cat) {
$this->db->select('*');
$this->db->from('ARTICLES');
if ($filtro_cat != 0) {
$this->db->where("ID_CAT=".$filtro_cat);
}
$query = $this->db->get();
if ($query->num_rows() > 0) {
return $query->result_array();
} else {
return FALSE;
}
}
When i select the button the url changes to http://localhost/Graf/index.php/articles/Category/1 but does not load
http://localhost/Graf/index.php/articles/
Why?

Answer 1

When you set third argument of load->view() to true it returns string value and does not output anything
Try changing:
$this->load->view('graf/articles', $data, TRUE);
to
$this->load->view('graf/articles', $data);

Answer 2

set the routes.php in folder config, add this code;
$route['articles/Category/(.*)'] = 'articles/$1';
and change the link
<li><a href="<?php echo site_url('index.php/articles/'.$item['ID_CAT']); ?>" ><?php echo $item['CATEGORY'] ?></a></li>
and change your controller to this
$this->load->view('graf/articles', $data);